Andrew french



I A. FRENCH. MACHINE FOR GRINDING GUTTERS 0F MOWING MACHINES.

No. 78,448. Patented June 2, 1868.,

fawn Zap liittfi 1,3125 giitfiilt ffigg ANDREW FRENCH, OF PHlLADELPHlA. PENNSYLVANIA.

Letters Patent No. 78,448, dated June 2, 1868.

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TO ALL WHOM IT MAY GONGERE:

Be it known that I, ANDB'E'WFBENCII, of the city of Philodciphimond State of Pennsylvania, have invented a new and improved Machine for Grinding or Sharpening the Cutters oi Mowing Reaping-Machines, or any euttingtools to which it may be adopted; 'and I do hereby declare that the following is a in, clear, andcxsct description of the construction and operation of tho same, rofevcnee being bad to the annexed drawings, making a port-of this specification, in which-'- Figure 1 is u perspective-view of the whole machine, and

Figure 2 a. view of a section, showing the arrangement for elevating. or lovreringthe main column.

Similar letters designate similar parts in both figures- This invention consists in mechanical devices and m-rsngemcnts, whereby the grinding-surface of a grindstone or emery-wheel is made to traverse in a plane, or any required curvnturc, to dress or grind s cutting-tool edge. It is also arranged to give the bevel back of the cutting edge of a tool the required slant, and is designed. for dressing the edges of moving or reaping-machines, or any other tools to which it may be adopted. The machine is cheap, simple, and believed to be novel, from its arrangement for grinding either straight or curved edges.

To enable othersskillsd in the art to make and use my invention, 1 will proceed to describe its construc- Lion and operation.

The machine is designed to be constructed of iron, (except the'grindstone or emery \vheel,) andtho bottom. instead of being a solid plate, irill be constructed in skeleton-form, and as light as practicable.

Letter A, fig. 1, is the upper portion of the main co1umn,which supports the swinging or vibratingirame G, and has projections above and below. These projections have pins 3 S, figs. 1 and 2, and the post 2' is suspended between them, being partly kept in place by the projections, and partly by the pins, which are inserted into holes in the end of the post 2', thus allowing it to vibrate freely.

Letter A, fig. 2, is the lower portion of the main column, having a slot, U, for the clamp-screw H, 'snd fitting into a. rabbst or groove in the cross-heed I, sufficiently loose to allow of beingmoved up and down.

Letter B, fig. 1, is o guide-plate, the rear or back end upper surface of which forms a bearing for the sol screw 2, which thus regulates, sets, or guides the grinding'surfnce of the grindstone or emery-wheel C. This pldte is cast with lugs, and an arm or projection cnrryingtho set-screw b, by which it is adjusted. These lugs, with the lugs TT on the bottom, L, and a. pin through them, form hinges, on which, in connection with the setscrew 6, the plate bears, and is made adjustable. The upper or guide-surface of this plate may be made plane,

convex, or concave, as required.

Letter 0, fig. 1, is e common grindstcne or emery-wheel of small dimensions, fixed on the rear end of the shaft 0.

Letter D, fig. L'isthe adjustable slide, carrying the set-screw e, and attached to the continuation V oi. the mm k.

Letter -E, fig 1, is a clamp, to .fssten the blade of thecutter firmly on the bed-pistol It has as hole sh each for the clamp-screws g g- Letter F, fig. Li: a. bed-plate, on which the blade of the cutter is clamped while being ground or sharpened This bed-piste moves on a pivot pluced a little in front of the stone or emery-wheel, so that the bed-piste zuoy be adjusted to required. angle;

Letter G, fig. 1, is a vibrating or swinging-frame, consisting of as post, i,-orm is, end its continuation V,

hinged at the post i, which is the centre of vibration, and carrying the vrheels M N, shaft 0, slide D, with its clamp-screw d, set-screw e, and gr'indstone or emery-wheel 0, all moving freely on the hinge formed by the post 1' and pins S S, :ind allowing a snilieient traversing motion of the grindstone or emerywheel'G, to grind or sharpen any length of edge required for its uses. This frame will be cast in one piece- Letter H, fig. 2, is the clamp-screw, for clamping the lower end of the adjustable column A to the crosshead 1', swimming in the slot U.

ram 2 Letters I I, figs. 1 and 2, is the cross-head, to which the-adjustable main column A is attached, by the clamp-screw H.

Letters K K, figs. 1 and 2, are the main bearing-posts, between which the cross-headLtui-ns, being hinged on the pin or red h.

Letters L L, figs. 1 and 2, is the bottom of the machine.

Letter M, fig. 1, is the main driving-wheel, (which may either be a pulley or cog-wheel.)

Letter N, fig. 1, is the small wheel on the shaft 0, (which may also either be a pulley or cog-wheel.)

Letter 0, fig. 1, is the shaft, carrying the small wheel N, and grindstone or cmery-wheel C.

Letter 1?, fig. 1, is the handle for turning the machine, and is fixed into the wheel M.

Letter R, fig.'1, is the journa of the driving-wheel M, which is fixed in tho post 1'.

Letters S S, figs. 1 and 2, are the pins or nipples, on which the post i turns.

Letters T.T, fig. 1, are the lugs on the bottom, L, to which the guide-plate B is hinged.

' Letter U, fign2, is the slot in the bottom of the main column A.

Letter V, fig. 1, is the continuation of the arm 1:. Through this the journal of the shaft 0 passes, and to it is attached the slide D. I

Letter W, fig. 1, is the band passing around the wheels M and N.

' Letters a a, fig. 1, are long staples, equivalent to a slot or groove, for attaching the set-screw 6 to the bottom, L, loosely, so that it may turn and move. This may be used in connection with the set-screw b, or not, at pleasure. I

Letter b, fig. 1, is the set screw, one end passing throughthe arm or extension of the plate 13, eitherbearing loosely on the bottom, L. or attached loosely to it by the staples a a, or equivalent grooves, or a slot through the bottom, L.

Letter 71, figs. 1 and 2, is the pin or red, passing. through the main posts K K and cross-head I, and on which the cross-head turns.

Letter i, fig. 1, is the post of the vibrating-frame G, with holes in the ends for the pins S S, and to which are attached the arm 70 and journal R, and having an aperture for the journal of the shaft 0. 7

Letter k, fig. 1, is the arm of the vibrating-frame G.

Letter m, fig. 1, are indentations or grooves in the bed-plate F, made for the edge of the grindstone or emery-wheel.

When operating this machine, it is first firmly clamped to the frame of the-mowing or reaping-machine, or any other suitable object, by a clamp, consisting of a bar and two screws passing through the bar, one at each end, and attached to the bottom of the machine, (which being a common device, appears to merit but little notice.) The eutterblade to be ground is then firmly clampcd'to the bed-plate F, by the plate E and screws g g, in such a position that the griudstone or emery-wheel, moving from side to side, will grind the edge of it evnly and of the desired shape. The bed-plate can be also then held in the same position, independent of the plate E, by a clamp-screw attached to it, and moving through a curved slot in the bottom, L, but which it was not considered necessary to show here. The angle of the rind'stone or emery-wheel is then elevated or depressed, and by adjusting it by means of the slide D and set-screw e, for adjusting that end of the vibratingframe G which is next the stone or emery-wheel, and also elevating or depressing the front end of it, bymeuns of the slot U and set-screw H, in connection with the main column A, moving'in the groove of the cross-head I. The guide-plate B is then set parallel to the shaft 0, bymeans of the set-screw 6, the plate B being of a plane surface, which will be the case when mowing or reaping-machine cutters are to be ground. The stone or emerywheeltis then swiftly rotated or turned with one hand, by means of the handle P, wheels M and N, bond W, and shaft 0, while, at the same time, the rear end of the frame G is vibrated, or moved from side to side over the edge by the other hand, until the edge is properly ground to the required gauge.

The cutter-blade is then loosed, and moved until the next cutting-edge is placed under the stone or emerywheel, when the same process is repeated, and so on until the whole cutter is finished.

It is necessary, after grinding the edges on one-side of the blades, to reverse the ends of the cutters, and then again proceed as ttbove.

The main column A, as described in this specification, may alsobe made with supports at each side, and an aperture or slot for the post a between them,.o'r the swinging motion may be obtained by casting flanges on the frame G, and hinging them to the ma column A, Or to a rod attached to the cross-head I. or passing through i The adjustable guide-plate is an importenti'eature in this invention, since by it the edge of a tool can be ground, within a certain limit, with a curve out or in, by elevating or depressing its surface, if plane; and should a shorter curve be required, it is only.nccessnry to make the part traversed by the set-screw 0 either convex or concave. I intend also, if preferred, for some uses, to attach the guide-plate B firmly to the machine, and without the extension or arm and set-sere'wb, and further, when the plate is made adjustable, to place its lugs and also those of the bottom, L, nearer the grindstone or emery-wheel, in which case the set-screw 6 need not be connected with the bottom, L, by the staples a a or a slot or groove, as previously described... the bearing upon it will be sullicicnt to keep it in contact with said bottom, L, while in use.

A circular boss or plate, (either permanently attached to the bottom, L, or cast with it,) oF'a proper diameter to fit, may be also used under the cutter-blade, and a. movable piece or slide placed in the rear of the grind'stone or emery-wheel, and either moving-in a groove in the said bottom, L, or on its surface, with a clam -screw attached, moving in a slot through said bottom, may be used in connection with the said 'circ'ular boss or plate instead of the bed-plate F, to carry the cutter while being ground.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The swinging or vibrating-frame G, hinged at the end opposite the grindstone-or emery-wheel, consisting of the post 1', arm k, and continuation V of the said arm 7:, in combination rith the lowering and raisingadjustments,,mude in the manner and for the put-polo described.

2. The guide-plate B, made in the manner and for the purpose described.

3. The slide 1) and let-screw e, in combination with the guide-plate B, swinging or vibrating-frame G, and sliding glot U, as described and made in the manner and for the purpoae indicated;

4. The wheels or puileys M and N, swinging or vibrating-frame G, blido D, set-sored e, and emery-wheel or grindetone C, in combination with the guide-pinto B, made in the manner and foi the purpose described.

' ANDREW FRENCH. [L. 5.]

Witnesses Joann 'Mnncnn, Connnnms DAVIS. 

